Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
nang mai » nang ma, nang tai, lang mai
van hieu » cao hieu
hanh tai » thanh tai, hang tai, han tai
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
xuc va » duc va, tuc va, luc va
thiet » thieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang mai hoi. ((hieu ve) or (hieu qua)) chat xuc va hanh tai ((van hieu) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang mai hoi. ((hieu ve) OR (hieu qua)) chat xuc va hanh tai ((van hieu) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang mai hoi. ((hieu ve) or (hieu qua)) chat xuc va hanh tai ((van hieu) or (va thiet))*.